private void btFact_Click(object sender, EventArgs e)
{
FormBill formBill = new FormBill();
formBill.lbTotAll.Text = lbTotFact.Text;
formBill.lbIdBill.Text = idBill;
formBill.Show();
}
private void btFact_Click(object sender, EventArgs e)
{
int user = Convert.ToInt32(lbIdUser.Text);
createBill(idDetails, lbDate.Text, totAll, user, amountProducts);
FormBill formBill = new FormBill();
formBill.lbTotAll.Text = lbTotFact.Text;
formBill.lbIdBill.Text = idDetails;
formBill.lbIdClient.Text = lbIdUser.Text;
formBill.Show();
this.Hide();
}